<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			var arr = [1,1,4,56,7,8,,8,7,5,34,5,6,4,];
			var newArr = Array.from(new Set(arr));
			console.log(newArr)
		</script>
	</body>
</html>
